RHUDDLAN'S historic bridge will remain single file to traffic for the 'foreseeable future'.
Earlier this year an inspection of the bridge, located on Station Road, found the cast iron cantilevered sections, which overhang the original stone structure, to be in need of repair.
Traffic crossing the was restricted to single file in February while repair work was due to be carried out for five months.
Now council chiefs have decided strengthening the bridge deck or replacing it would have cost millions of pounds and been unviable.
A Denbighshire Council spokesman said: "A number of options were considered by the council and it was found that the most deliverable project was to formalise the implementation of the current traffic light solution and maintain single lane traffic over the bridge, a system that appears to be working well with minimal disruption.
"Other options, such as strengthening the bridge deck and even replacement would have cost millions of pounds and would be difficult to deliver due to the bridges’ deserved Scheduled Monument Status.
"They would also take a considerable amount of time and disruption to implement and were therefore not seen to be viable."
The bridge, which was erected in 1595, is the third of its kind on the site – with the original structure built in 1297.
The carriageway width has been restricted to a single lane to allow traffic to pass directly over the arches, avoiding the need for the adoption of a severe weight restriction, which would have prevented vehicles such as buses and even fire engines from passing over the bridge.